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Application of uio-66 coated with rhodamine 6g in fluorescence detection of iron ions

A fluorescence detection, uio-66 technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve problems such as poor applicability and small linear range of fluorescence intensity

Inactive Publication Date: 2021-07-16
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] CN 108593616A discloses a preparation method of UiO-66-NH2 for fluorescence detection of iron ions. Iron ions have an obvious quenching effect on the fluorescence of the UiO-66-NH2, but the UiO-66-NH2 is still a fluorescent probe The above-mentioned traditional fluorescent probes based on a single fluorescent signal are easily affected by factors such as the concentration of the detection substrate, the external environment and instrument conditions, and the linear range between the fluorescence intensity and the iron ion concentration is very small, and the applicability is poor.

Method used

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  • Application of uio-66 coated with rhodamine 6g in fluorescence detection of iron ions
  • Application of uio-66 coated with rhodamine 6g in fluorescence detection of iron ions
  • Application of uio-66 coated with rhodamine 6g in fluorescence detection of iron ions

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Experimental program
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Effect test

Embodiment 1

[0031] 1. Synthesis of UiO-66

[0032] ①Take a 50mL beaker, pipette 14mL of DMF into the beaker, then pipette 2.5mL of glacial acetic acid into the beaker, then add 5mM zirconium chloride into the beaker, and sonicate until the zirconium chloride dissolves.

[0033] ②Take a 10mL beaker, pipette 4mL of DMF into the beaker, then add 5mM terephthalic acid, and sonicate until dissolved.

[0034] ③Transfer the solution in step ② into the beaker of step ①, stir for 5 minutes, then transfer to a 50mL polytetrafluoroethylene autoclave, heat up the oven at 20°C per hour, keep it at 120°C for 36h, and then directly cool down , centrifuged at 12000rpm for 3 minutes, washed the solid powder with DMF 3 times, soaked overnight, then centrifuged the powder, washed 3 times with methanol, soaked overnight, then centrifuged to collect the powder, and dried overnight in vacuum at room temperature to obtain a white The powder is UiO-66.

[0035] 2. Synthesis of R6G@UiO-66

[0036] UiO-66 (15mg...

Embodiment 2

[0038] Embodiment 2 ratiometric fluorescence method detects Fe3+

[0039] (1) Add R6G@UiO-66 to distilled water to prepare a 50mg / L fluorescent probe solution.

[0040] (2) Sample solution: Prepare a series of Fe with different concentration levels (10-7M, 10-6M, 10-5M, 10-4M, 10-3M, 10-2M) 3+ The standard solution and other metal cation solutions with a concentration of 300 μM are ready for use.

[0041] (3) Get 2mL of the fluorescent probe solution of step (1) in a four-sided light-transmitting quartz cuvette, then add the sample solution of step (2), detect the fluorescence intensity with a fluorescence spectrometer, and set the slit width of the fluorescence spectrometer 10nm, set the excitation light wavelength to 365nm, and detect the emission peak fluorescence intensity at the wavelengths of 422nm (corresponding to the fluorescence of UiO-66) and 550nm (corresponding to the fluorescence of R6G).

[0042] The results showed that the addition of Fe 3+ Afterwards, with ...

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Abstract

The invention discloses UiO-66 wrapped with rhodamine 6G in fluorescence detection of Fe 3+ in the application. The UiO‑66 encapsulated with rhodamine 6G was used as a fluorescent detection Fe 3+ The ratiometric fluorescent probe, in which the fluorescence of UiO-66 is the reference signal, and the fluorescence of Rhodamine 6G is the response signal. Compatible with existing fluorescent detection of Fe 3+ In contrast, the present invention uses UiO-66 wrapped with rhodamine 6G as a fluorescent probe, which is easy to store and has good stability. 3+ With good selectivity, the Fe 3+ It is easy to operate and has high sensitivity, and can effectively avoid errors caused by the concentration of fluorescent probes and the environment.

Description

technical field [0001] The invention relates to UiO-66 coated with rhodamine 6G in the fluorescence detection of Fe 3+ in the application. Background technique [0002] Ferric ions play an important role in the human body and the ecological environment. Abnormal content of Fe 3+ Can lead to physical disorders such as Fe deficiency 3+ Can cause anemia and decline in physical function; excessive intake of Fe 3+ Can cause damage to the liver and kidneys. So far, people have developed a variety of detection Fe 3+ methods, such as flame atomic absorption spectrometry, graphite furnace atomic absorption spectrometry, and inductively coupled plasma spectrometry. However, these methods are time consuming, complex and require expensive instruments. Therefore, to establish a fast and simple detection Fe 3+ method is very necessary. [0003] Metal-organic frameworks (MOFs) are a class of materials with tunable pore sizes formed by self-assembly of organic ligands and metal cen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/64
Inventor 卢小泉李金芳魏丽萍王铁英张银潘胥亚丽吴艳霞孙和水陕多亮陈晶韩振刚
Owner NORTHWEST NORMAL UNIVERSITY
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